IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Patents  
    Recent publications  
    Author's Guide  
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 31, Number 4, Page 475 (1987)
Aspects of Computer Performance
  Full article: arrowPDF   arrowCopyright info





   

The inconsistency index method for estimating the accuracy of Schweitzer’s approximation

by D. Sitaram
Product-form queueing networks have proved to be useful for predicting the performance of computer systems. In practice, these networks are analyzed using approximate methods because exact methods are computationally too expensive. Schweitzer’s approximation is one of the most commonly used. However, there is no method for estimating the error in the solution. This paper proposes a new approach for estimating the error in Schweitzer’s approximation for fixed-rate product-form networks. It is based on detecting the extent to which the approximation assumptions used hold. Empirical evidence is presented to show that this approach can be used to accurately predict the error in the approximation.
Related Subjects: Performance analysis; Queuing theory and applications